30.8.10 Secure Region Unlock Bits
Important: This register is only
available for SAM
L11 and has no effect
for SAM
L10.
| Name: | SULCK |
| Offset: | 0x20 |
| Reset: | x initially determined from NVM User Row after reset |
| Property: | PAC Write-Protection, Write-Secure |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| SLKEY[7:0] | |||||||||
| Access | W/-/W | W/-/W | W/-/W | W/-/W | W/-/W | W/-/W | W/-/W | W/-/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| DS | AS | BS | |||||||
| Access | RW/R/RW | RW/R/RW | RW/R/RW | ||||||
| Reset | x | x | x |
Bits 15:8 – SLKEY[7:0] Secure Unlock Key
When this bit group is written to the key value 0xA5, the write will be performed. If a value different from the key value is tried, the write will be discarded and INTFLAG.KEYE set.
Bit 2 – DS Data Flash Secure Unlock Bit
Default state after erase will be unlocked (0x1).
| Value | Description |
|---|---|
| 0 | The DS region is locked. |
| 1 | The DS region is not locked. |
Bit 1 – AS APPLICATION Secure Unlock Bit
Default state after erase will be unlocked (0x1).
| Value | Description |
|---|---|
| 0 | The Secure Flash (AS region) is locked. |
| 1 | The Secure Flash (AS region) is not locked. |
Bit 0 – BS BOOT Secure Unlock Bit
Default state after erase will be unlocked (0x1).
| Value | Description |
|---|---|
| 0 | The Secure Flash (BS region) is locked. |
| 1 | The Secure Flash (BS region) is not locked. |